The pptemplate script is the easiest way to start a new module
for PDL that contains PP code (see also the PDL::PP manpage). The usage is simply

pptemplate modulename;

As a result pptemplate will generate a perl Makefile for the new
module (Makefile.PL) that contains the minimal structure to
generate a module from PP code and also a skeleton file
for your new module.

The file will be called mymod.pd if you called pptemplate as

pptemplate PDL::CleverAlgs::Mymod;

I suppose you can work out the naming rule ;). If not resort to
experimentation or the source code.

pptemplate will refuse to overwrite existing files of the same name
to avoid accidents. Move them out of the way if you really want to scrap
them.

Currently there is only the -i option which switches pptemplate
into the so called internal mode. It should only be used when you
are starting a new module within the main PDL tree that is supposed to
be part of the PDL distribution and the normal PDL build process, e.g.